ELEPHANT’S TOOTHPASTE: An impressive experiment you can try at home

SAFETY TIP: This experiment requires adult supervision. Make sure to wear dishwashing gloves and safety glasses.

WHAT YOU NEED:
Dishwashing gloves
Safety glasses
100 mL, 6% Hydrogen Peroxide (available from most chemists)
Measuring cup
500 mL PET bottle
Funnel
Plastic tray or large baking dish
Dishwashing detergent
Food colouring (any type except cochineal)
Small cup
Sachet of dry yeast
Tablespoon
Lukewarm water
Optional pop-top for extra height

WHAT'S HAPPENING?
The activity is called ’Elephant’s Toothpaste’ because the large stream of foam looks like toothpaste that is big enough for an elephant! The foam is made as the dishwashing detergent traps tiny oxygen bubbles created by the chemical reaction.

For more information and investigations, check out our website:
https://www.questacon.edu.au/outreach...